Home / 11,287.72-15,571.68-7,512.64

Finding the Fourth Proportional to 11,287.72, 15,571.68 and 7,512.64

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Solution

The fourth proportional to 11,287.72, 15,571.68 and 7,512.64 is: 10,363.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,287.72 : 15,571.68 = 7,512.64 : x
  2. Step 2: Convert to fraction form
    11,287.72/15,571.68 = 7,512.64/x
  3. Step 3: Cross multiply
    11,287.72x = 15,571.68 × 7,512.64
  4. Step 4: Simplify right side
    11,287.72x = 116,984,426.04
  5. Step 5: Solve for x
    x = 116,984,426.04/11,287.72
  6. Step 6: Final answer
    x = 10,363.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.